article 2014 9 pages Relationship of Different Perceived Exertion Scales in Walking or Running with Self-Selected and Imposed Intensity Marcelo Ricardo Cabral Dias, Roberto Simão, Geraldo Heleno Ribeiro Machado, Hélio Furtado, Nelson Fortuna Sousa, Helder Miguel Fernandes, Francisco José Félix Saavedra JournalJournal of Human KineticsDOI10.2478/hukin-2014-0100Populationtrained men View on DOI ↗